2023

1. R. Sun#, A. Bhattacharyya, M. Saleh, S. Krishnamoorthy, M. A. Scarpulla#, Influences of orientation and remote O₂ plasma exposure on the interface properties of SiO₂/β-Ga₂O₃ MOS capacitors, IEEE Transactions on Electron Devices, vol. 70, no. 3, pp. 1188-1193, March 2023, doi: 10.1109/TED.2023.3235322
2. Rujun Sun#, Andrew R. Balog, Haobo Yang, Nasim Alem, Michael A. Scarpulla#, Degradation of β-Ga₂O₃ vertical Ni/Au Schottky diodes under forward bias, IEEE Electron Device Letters, vol. 44, no. 5, pp. 725-728, MAY 2023, doi: 10.1109/LED.2023.3258644

2022

1. W. Lei*, K. Dang*, H. Zhou#, J. Zhang, C. Wang, Q. Xin, S. Alghamdi, Z. Liu, Q. Feng, R. Sun, C. Zhang, Y. Hao, Proposal and Simulation of Ga₂O₃ MOSFET With PN Heterojunction Structure for High-Performance E-Mode Operation, IEEE Transactions on Electron Devices, vol. 69, no. 7, pp. 3617-3622, July 2022, doi: 10.1109/TED.2022.3172919.

------------------------------------------------------PhD & Postdoc before joining Xidian U--------------------------------------------------

2022

1. L. Ghadbeigi, R. Sun, J. Jesenovec, A. Bhattacharyya, J. S. McCloy, S. Krishnamoorthy, M. A. Scarpulla, B. Sensale-Rodriguez, Electronic and ionic conductivity in β-Ga₂O₃ single crystals, Journal of applied physics, Journal of Applied Physics 131, 085102 (2022) (Special topics: Wide Bandgap Semiconductor Materials and Devices)

2021

1. R. Sun#, Y.K. Ooi, P. Ranga, A. Bhattacharyya, S. Krishnamoorthy, M.A. Scarpulla#, Oxygen annealing induced changes in defects within b-Ga₂O₃ epitaxial films measured using photoluminescence, Journal of Physics D: Applied Physics 54 (2021) 174004. (Special issue: Gallium Oxide Devices and Materials)
2. P. Ranga, A. Bhattacharyya, A. Chmielewski, S. Roy, R. Sun, M.A. Scarpulla, N. Alem, S. Krishnamoorthy, Growth and Characterization of Low Sheet Resistance Metalorganic Vapor-Phase Epitaxy-Grown β-(Al_xGa_1-x)₂O₃/β-Ga₂O₃ Heterostructure Channels, Appl. Phys. Express 14 (2), 025501 (2021).
3. Leila Ghadbeigi, Jacqueline Cooke, Giang T Dang, Toshiyuki Kawaharamura, Tatsuya Yasuoka, Rujun Sun, Praneeth Ranga, Sriram Krishnamoorthy, Michael A Scarpulla, Berardi Sensale-Rodriguez, Optical Characterization of Gallium Oxide α and β Polymorph Thin-Films Grown on c-Plane Sapphire, J. Electron. Mater. 50 (6), 2990 (2021).
4. Roy, S., Chmielewski, A. E., Bhattacharyya, A., Ranga, P., Sun, R., Scarpulla, M. A., Krishnamoorthy, S., In Situ Dielectric Al₂O₃/β-Ga₂O₃ Interfaces Grown Using Metal–Organic Chemical Vapor Deposition, Advanced Electronic Materials 7 (11), 2100333 (2021).

2020

1. R. Sun, Y.K. Ooi, A. Bhattacharyya, M. Saleh, S. Krishnamoorthy, K.G. Lynn, M.A. Scarpulla, Defect states and their electric field-enhanced electron thermal emission in heavily Zr-doped b-Ga₂O₃ crystals, Appl. Phys. Lett., 117 (2020), 212104. (Special issue: Ultrawide Bandgap Semiconductors)
2. R. Sun, Y.K. Ooi, P.T. Dickens, K.G. Lynn, M.A. Scarpulla, On the origin of red luminescence from iron-doped b-Ga₂O₃ bulk crystals, Appl. Phys. Lett., 117 (2020) 052101. (Special issue: Ultrawide Bandgap Semiconductors)
3. R. Sun, D. Zhuang, M. Zhao, N. Zhang, Q. Gong, Y. Wei, G. Ren, Y. Wu, J. Wei, Efficient Cu₂ZnSn(Se,S)₄ solar cells with 79% fill factor using two-step annealing, Sol. Energy Mater. Sol. Cells, 215 (2020) 110682.
4. J. Cooke, L. Ghadbeigi, R. Sun, A. Bhattacharyya, Y. Wang, M.A. Scarpulla, S. Krishnamoorthy, B. Sensale-Rodriguez, Synthesis and characterization of large‐area nanometer‐thin b-Ga₂O₃ films from oxide printing of liquid metal gallium, physica status solidi (a), 217 (2020) 1901007.
5. S.R. Kingston, N.K.T. Jayakumar, M.U. Saleh, E.J. Benoit, A.S. Edun, R. Sun, C.M. Furse, M.A. Scarpulla, J.B. Harley, Measurement of Capacitance Using Spread Spectrum Time Domain Reflectometry (SSTDR) and Dictionary Matching, IEEE Sensors Journal, 20 (2020) 10102-10109.

2019

1. R. Sun, D. Zhuang, M. Zhao, N. Zhang, M. Xie, Y. Wei, G. Ren, Y. Wu, Q. Gong, J. Wei, Phases formation of Cu₂ZnSnS₄ thin films by sulfurizing stacked precursors by sputtering from CuZn and CuSn targets, Thin Solid Films, 690 (2019) 137561.
2. Y. Wei, D. Zhuang, M. Zhao, Q. Gong, R. Sun, G. Ren, Y. Wu, L. Zhang, X. Lyu, X. Peng, J. Wei, An investigation on the relationship between open circuit voltage and grain size for CZTSSe thin film solar cells fabricated by selenization of sputtered precursors, J. Alloys Compd., 773 (2019) 689-697.
3. X. Lyu, D. Zhuang, M. Zhao, N. Zhang, X. Yu, L. Zhang, R. Sun, Y. Wei, X. Peng, Y. Wu, G. Ren, J. Wei, The effects of annealing temperature on CIGSeS solar cells by sputtering from quaternary target with H₂S post annealing, Appl. Surf. Sci., 473 (2019) 848-854.
4. L. Zhang, D. Zhuang, M. Zhao, R. Sun, Y. Wei, X. Lyu, Study on Sb₂S₃ promoted Cu(InGa)Se₂ films grain growth without post-selenization, Taiyangneng Xuebao, 40 (2019) 51-55.

2018

1. R. Sun, D. Zhuang, M. Zhao, Q. Gong, Y. Wei, G. Ren, Y. Wu, Cu₂ZnSn(SSe)₄ solar cells with 9.6% efficiency via selenizing Cu-Zn-Sn-S precursor sputtered from a quaternary target, Sol. Energy Mater. Sol. Cells, 174 (2018) 42-49.
2. R. Sun, D. Zhuang, M. Zhao, Q. Gong, M. Scarpulla, Y. Wei, G. Ren, Y. Wu, Beyond 11% efficient Cu₂ZnSn(Se,S)₄ thin film solar cells by cadmium alloying, Sol. Energy Mater. Sol. Cells, 174 (2018) 494-498.
3. Y. Wei, D. Zhuang, M. Zhao, W. Zhang, G. Ren, Y. Wu, R. Sun, Q. Gong, L. Zhang, S. Zhan, X. Peng, X. Lyu, Beyond 10% efficient CZTSSe thin-film solar cells fabricated by a two-step CdS deposition process, Sol. Energy Mater. Sol. Cells, 180 (2018) 19-24.
4. Y. Wei, D. Zhuang, M. Zhao, Q. Gong, R. Sun, L. Zhang, X. Lyu, X. Peng, G. Ren, Y. Wu, J. Wei, Effects of selenium atmosphere on grain growth for CZTSe absorbers fabricated by selenization of as-sputtered precursors, J. Alloys Compd., 755 (2018) 224-230.
5. Y. Wei, D. Zhuang, M. Zhao, Q. Gong, R. Sun, G. Ren, Y. Wu, L. Zhang, X. Lyu, X. Peng, An investigation on phase transition for as-sputtered Cu₂ZnSnSe₄ absorbers during selenization, Sol. Energy 164 (2018) 58-64.
6. X. Peng, M. Zhao, D. Zhuang, R. Sun, L. Zhang, Y. Wei, X. Lv, Y. Wu, G. Ren, Study on how the content of selenium in the precursors influences the properties of CuInSe₂ thin films, Appl. Surf. Sci., 434 (2018) 452-455.
7. X. Peng, M. Zhao, D. Zhuang, R. Sun, L. Zhang, Y. Wei, X. Lv, Y. Wu, G. Ren, 10.3%-efficient submicron-thick Cu(In,Ga)Se₂ solar cells with absorber fabricated by sputtering In₂Se₃, CuGaSe₂ and Cu₂Se targets, Appl. Surf. Sci., 442 (2018) 308-312.
8. Y. Wei, D. Zhuang, M. Zhao, N. Zhang, X. Yu, R. Sun, L. Zhang, X. Lyu, X. Peng, J. Wei, Fabrication of wide band-gap CuGaSe₂ solar cells for tandem device applications by sputtering from a ternary target and post selenization treatment, Mater. Lett., 230 (2018) 128-131.
9. Y. Wei, D. Zhuang, M. Zhao, R. Sun, G. Ren, L. Zhang, X. Lyu, Y. Wu, X. Peng, J. Wei, Pre-deposition of CdS layers to improve the diode quality of CZTSSe solar cells, Mater. Lett., 229 (2018) 372-374.
10. X. Peng, M. Zhao, D. Zhuang, R. Sun, L. Zhang, Y. Wei, X. Lv, Y. Wu, G. Ren, Two-stage method to enhance the grain size of Cu(In,Ga)Se₂ absorbers based on sputtering quaternary Cu(In,Ga)Se₂ target, Mater. Lett., 212 (2018) 165-167.
11. X. Lyu, D. Zhuang, M. Zhao, Q. Gong, L. Zhang, R. Sun, Y. Wei, X. Peng, Y. Wu, G. Ren, An investigation on performance enhancement for KF post deposition treated CIGS solar cells fabricated by sputtering CIGS quaternary targets, Vacuum, 151 (2018) 233-236.
12. X. Peng, M. Zhao, D. Zhuang, R. Sun, L. Zhang, Y. Wei, X. Lv, Y. Wu, G. Ren, Ga₂Se₃ treatment of Cu-rich CIGS thin films to fabricate Cu-poor CIGS thin films with large grains and U-shaped Ga distribution, Vacuum, 152 (2018) 184-187.

2017

1. R. Sun, M. Zhao, D. Zhuang, Q. Gong, L. Guo, L. Ouyang, Y. Wei, High-sulfur Cu₂ZnSn(S,Se)₄ films by sulfurizing as-deposited CZTSe film: The evolutions of phase, crystallinity and S/(S+Se) ratio, J. Alloys Compd., 695 (2017) 3139-3145.
2. L. Zhang, D. Zhuang, M. Zhao, Q. Gong, L. Ouyang, L. Guo, R. Sun, Y. Wei, S. Zhan, X. Lyu, X. Peng, Investigation on Sb-doped induced Cu(InGa)Se₂ films grain growth by sputtering process with Se-free annealing, Sol. Energy 157 (2017) 1074-1081.
3. L. Zhang, D. Zhuang, M. Zhao, Q. Gong, L. Guo, L. Ouyang, R. Sun, Y. Wei, S. Zhan, X. Lyu, X. Peng, A study on mechanisms of Sb-doping induced grain growth for Cu(InGa)Se₂ absorbers deposited from quaternary targets, J. Alloys Compd., 727 (2017) 572-578.
4. L. Zhang, D. Zhuang, M. Zhao, Q. Gong, L. Guo, L. Ouyang, R. Sun, Y. Wei, S. Zhan, The effects of annealing temperature on CIGS solar cells by sputtering from quaternary target with Se-free post annealing, Appl. Surf. Sci., 413 (2017) 175-180.
5. X. Peng, M. Zhao, D. Zhuang, L. Guo, L. Ouyang, R. Sun, L. Zhang, Y. Wei, S. Zhan, X. Lv, Y. Wu, G. Ren, Eliminating the excess Cu_xSe phase in Cu-rich Cu(In,Ga)Se₂ by In₂Se₃ treatment, J. Alloys Compd., 709 (2017) 31-35.
6. X. Peng, M. Zhao, D. Zhuang, L. Guo, L. Ouyang, R. Sun, L. Zhang, Y. Wei, S. Zhan, X. Lv, Y. Wu, G. Ren, Multi-layer strategy to enhance the grain size of CIGS thin film fabricating by single quaternary CIGS target, J. Alloys Compd., 710 (2017) 172-176.
7. X. Peng, M. Zhao, D. Zhuang, R. Sun, L. Zhang, Y. Wei, X. Lv, Y. Wu, G. Ren, Fabricating Cu(In,Ga)Se₂ (CIGS) thin films with large grains based on the quaternary CIGS targets, Vacuum, 146 (2017) 282-286.
8. L. Zhang, D. Zhuang, M. Zhao, Q. Gong, L. Guo, L. Ouyang, R. Sun, Y. Wei, S. Zhan, The effects of selenium content on Cu(InGa)Se₂ thin film solar cells by sputtering from quaternary target with Se-free post annealing, Vacuum, 137 (2017) 205-208.
9. L. Zhang, D. Zhuang, M. Zhao, Q. Gong, L. Guo, L. Ouyang, R. Sun, Y. Wei, X. Lyu, X. Peng, Sb₂S₃ thin films prepared by vulcanizing evaporated metallic precursors, Mater. Lett., 208 (2017) 58-61.

2016

1. R. Sun, M. Zhao, D. Zhuang, X. Li, Q. Gong, L. Ouyang, L. Guo, M. Cao, Cu₂ZnSnS₄ ceramic target: Determination of sintering temperature by TG-DSC, Ceram. Int., 42 (2016) 9630-9635.
2. R. Sun, M. Zhao, D. Zhuang, Q. Gong, M. Xie, L. Ouyang, L. Guo, L. Zhang, Effects of selenization on phase transition and S/(S+Se) ratios of as-deposited Cu₂ZnSnS₄ absorbers sputtered by a quaternary target, Mater. Lett., 164 (2016) 140-143.
3. L. Ouyang, D. Zhuang, M. Zhao, Q. Gong, L. Guo, R. Sun, L. Zhang, Cu(In,Ga)Se₂ solar cells fabricated by sputtering from copper-poor and selenium-rich ceramic target with selenium-free post treatment, Mater. Lett., 184 (2016) 69-72.
4. X. Li, M. Zhao, D. Zhuang, Q. Gong, M. Cao, L. Ouyang, L. Guo, R. Sun, Z. Gao, Reaction mechanism of Cu(In,Ga)Se₂ formation during milling process of powder mixture of Cu₂Se, In₂Se₃ and Ga₂Se₃, Cailiao Yanjiu Xuebao, 30 (2016) 1-5.
5. M. Cao, M. Zhao, D. Zhuang, L. Guo, L. Ouyang, R. Sun, S. Zhan, Optical and electronic properties of Nb doped indium-zinc oxide films grown by magnetron sputtering, Cailiao Yanjiu Xuebao, 30 (2016) 649-654.

2015

1. L. Ouyang, D. Zhuang, M. Zhao, N. Zhang, X. Li, L. Guo, R. Sun, M. Cao, Cu(In,Ga)Se₂ solar cell with 16.7% active-area efficiency achieved by sputtering from a quaternary target, Phys. Status Solidi A Appl. Mater. Sci., 212 (2015) 1774-1778.
2. L. Ouyang, M. Zhao, D. Zhuang, J. Han, Z. Gao, L. Guo, X. Li, R. Sun, M. Cao, Annealing treatment of Cu(In,Ga)Se₂ absorbers prepared by sputtering a quaternary target for 13.5% conversion efficiency device, Sol. Energy 118 (2015) 375-383.
3. X. Li, M. Zhao, D. Zhuang, M. Cao, L. Ouyang, L. Guo, R. Sun, Z. Gao, Fabrication of Se-rich Cu(In_1-xGa_x)Se₂ quaternary ceramic target, Vacuum, 119 (2015) 15-18.
4. X. Li, M. Zhao, D. Zhuang, M. Cao, L. Ouyang, L. Guo, Z. Gao, R. Sun, Influences of Na on sintering of Cu(In,Ga)Se₂ quaternary ceramic targets, J. Alloys Compd., 636 (2015) 335-340.
5. L. Guo, M. Zhao, D.M. Zhuang, M. Cao, L. Ouyang, X. Li, R. Sun, Z. Gao, Influences of CuO phase on electrical and optical performance of Cu₂O films prepared by middle frequency magnetron sputtering, Appl. Surf. Sci., 359 (2015) 36-40.
6. Z. Gao, M. Zhao, D. Zhuang, E. Fu, X. Li, L. Ouyang, L. Guo, R. Sun, K. Kimura, K. Nakajima, Study on the performance of Tungsten-Titanium alloy film as a diffusion barrier for iron in a flexible CIGS solar cell, Sol. Energy 120 (2015) 357-362.

2014

1. L. Ouyang, M. Zhao, D. Zhuang, R. Sun, L. Guo, X. Li, M. Cao, Influence of annealing temperature on electric properties of Cu(In_1-xGa_x)Se₂ thin films, Cailiao Yanjiu Xuebao, 28 (2014) 745-750.